Improvement in gas-stoves



. 3 Shet Sheet 1. P. MIHAN.

Gas Stove.

. No. 17,608. Patented June-16, 1857.

3 SheetsSheet 2.

P. MIHAN.

I Gas Stove.

No. 17,608. Patented. June 16, 1851.

Ziy

3 Sheets-Sheet 3. P. MIHAN.

Gas Stove..

' No. 17,608. Patented June 16, 1857.

UNITED STATES PATENT OFFICE.

PATRICK MII'IAN, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND ROBERT E. FITTS.

IMPROVEMENT m GAS-STOVES.

Specification forming part of Letters Patent N 0. 17,608, dated June 16, 1857.

To all whom it may concern:

Be it known that I, PATRICK MIHAN, of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improved Gas-Stove; and I do hereby declare that the same is fully described and represented in the following specification and the accompanying drawings, of which- Figure 1 exhibits a top view, and Fig. 2 a side elevation, of the same; Fig. 3, a vertical and transverse section of it.

In the drawings, A denotes the base-plate of the stove, the same being provided with numerous openings a a for air to pass freely upward through it into a cylindrical chamber B, arranged over the base-plate, as shown in Fig. 3. Leading out of the top of this chamberB is an inverted tapering radiator O, which is open at its upper and lower ends, and at its top is jointed to a cylindrical case D, that rests on and extends up from the base A, and so encompasses the chamber B as to leave an air-space E between the two, such space being open at its top and bottom to allow air to pass into the chamber F between the two radiators O and D. On the top of the chamber B, and so as to encompass the lower part of the raditor C, is an annular pipe G, which is provided with an inlet-pipe H and sundry dischargeholes a at extending from it, as shownin the drawings. The said pipe or gas distributer G has a perforated or wire-gauze partition I arranged over it, extending up from the top plate of the chamber B and to and entirely around the radiator C. This wire-gauze partition I, or air and gas mixer, as it may be termed, is inclined toward the radiator O, which also inclines in. an opposite direction. By inclining the two in opposite directions, as shown, an important advantage is gained, as when but little gas is used it will be burned at the upper part of the mixer, and the flame, owing to theinclination of the radiator C, will be brought into close contact with it, and the heat be abstracted to much better advantage than would be the case were the absorbing surface arranged vertically. The said part I may be made of wire-gauze or perforated sheet metal, itsobj ect being to coinmiuglc air and gas and enable the same to be burned on its upper surface, For this purpose air-inlets b are made through the top plate of the chamber 13, and so that air may pass to and against the under surface of the part I.

From the above it will be seen that air can pass into the chamber E and over the upper surface of the part I. Within the upper part of the radiator 0 there is arranged a secondary chamber or radiator K, which is connected with the radiator C by means of a series of pipes L L L, so applied to both as to enable the smoke and volatile products of combustion that may be generated within the space E to pass through the said pipe Linto the said secondary radiator K. This latter radiator K tapers downward, and has a discharge pipe M extending out of its lower end and down the radiator G into the chamber 13, and

from thence outward through the base-plate A to any convenient flue for discharging smoke into the atmosphere.

In the operation of this stove gas and air are mixed together and burned on the upper surface of the distributer I and in the chamber E, between the outer case D and the radiator O, the said outer case D being provided with a small opening N and a door 0 thereto, the same being arranged just above the dis tributer I, as shown in the drawings, the object of the opening N being to enable a per son to inflame the gas which may rise above the distributer. The gas and air being burned within a chamber F encompassing the radiator 0 heat will be absorbed and radiated by the case D, (orouter radiator,) as well as by the radiator C, so that air which may pass in contact-with the external surface of the case D and the internal surface of the radiator C will be heated thereby. Besides this the air above and around the sides of the secondary radiator K and its escape-pipe will be heated by radiation therefrom. The secondary radiator K and its pipe M also serve the purpose of receiving and carrying oi the spent gases, or those which, if discharged into a room, would be injurious to respiration or disagreeable in other respects.

In my stove the arrangement of the gas-distributer G and the air and gas mixer I with their air-inlet passages, and in the chamber F, or with respect to the radiators C and D, as described, is productive of great advau tage, so far as applying the heat or flame to the heat-absorbing surface is concerned.

I do not claim arranging a gas-distributing tube and an air and gas mixer between tWo concentric surfaces provided with air-inlets arranged so that air may pass with the gas through perforations of the mixer or cap only, as my arrangement involves something more than this, for in connection therewith I employ an external air-passage, by which air is carried into the space above the mixer, and by its operation not only promotes combustion, but causes the flame to be maintained to good advantage against the surface of the inclined radiator O; neither do I claim an annular gas-burner arranged between tWo radiators and having passages for air to pass between it and each radiator and to the flame that may be generated above the exit-holes of said burner, as I employ an air and gas burner and not a mere gas-burner; nor do I claim simply making the air and gas mixer or cap in a conical form; nor do I claim combining with a gas-burner an ascending and descending flue, one being concentric with the other, and Whether the descending flue is either within or Without the other; nor do I claim the construction of gas-stoves as described on pages 86 and 87 of Websters Encyclopedia, my invention differing essentially therefrom; but

What I do claim is 1. Arranging an annular, gas-distributing tube G, a perforated or Wire-gauze. mixer I, two radiators O and D, an air-space within the radiator O, and air-inlet spaces B E, the one leading air above and the other below the surface of the mixer, substantially as described, this arrangement involving inclining the gas-mixer I and the radiator O in opposite directions With respect to one another, substantially as described.

2. The arrangement of the secondary radiator K and its discharge-tube M with reference to the radiator O, the open air-space Within the latter and the chamber F, and the air and gas burner apparatus disposed at the bottom of said chamber, as specified.

In testimony whereof I have hereunto set my signature.

PATRICK MIHAN.

Witnesses:

R. H. EDDY, F. P. HALE, Jr. 

